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Finding the Fourth Proportional to 76,145.08, 105,080.34 and 42,611.08

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Solution

The fourth proportional to 76,145.08, 105,080.34 and 42,611.08 is: 58,803.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,145.08 : 105,080.34 = 42,611.08 : x
  2. Step 2: Convert to fraction form
    76,145.08/105,080.34 = 42,611.08/x
  3. Step 3: Cross multiply
    76,145.08x = 105,080.34 × 42,611.08
  4. Step 4: Simplify right side
    76,145.08x = 4,477,586,774.17
  5. Step 5: Solve for x
    x = 4,477,586,774.17/76,145.08
  6. Step 6: Final answer
    x = 58,803.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.